Using sscanf instead of regex, but needs testing on MSVC
Using sscanf instead of regex, but needs testing on MSVC

This uses the C99 SCNx32/16/8 macros, which MSVC claims to have
implemented in VS2013:

https://blogs.msdn.microsoft.com/vcblog/2013/07/19/c99-library-support-in-visual-studio-2013/

neosmart/uuidxx